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性器官-男性性器官
The
Sex Organs - The Male Sex
Organs
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内部性器官：附属腺
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为了在射精后能够存活下来，精子需要在粘稠的、富含营养和具有保护作用的液体里游弋，这种液体就是精液。事实上，精液由数种不同的液体所构成，它们从尿道不同的部位汇集而来。这些液体中最重要的部分由以下将要讲述的器官所产生。
The
Internal Sex Organs: Accessory Organs
In order to survive after their ejaculation, the sperm cells need to swim in a thick, nourishing, protective fluid called semen. Actually, the semen is composed of several different fluids which come together at various points in the urethra. The most important of these fluids are produced by the organs described in the following sections.
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